2024-03-28T19:54:12Z
https://niigata-u.repo.nii.ac.jp/oai
oai:niigata-u.repo.nii.ac.jp:00006622
2022-12-15T03:39:57Z
453:456
471:537:568:645
The Structure of the Autonomic End Apparatus in the Guinea-pig Small Intestine and the Problem of the Interstitial Cells of Cajal
The Structure of the Autonomic End Apparatus in the Guinea-pig Small Intestine and the Problem of the Interstitial Cells of Cajal
Kobayashi, Shigeru
This review deals with the historical advances of concepts concerning the autonomic innervation in the gut. Discussion is focused on the problem of determining the characteristics of the interstitial cells of Cajal, as this has become the crucial point in understanding the controversies which have surrounded the past studies of the autonomic end-apparatus in the gut. The author has gathered morphological data on the nerve plexuses in the guinea-pig small intestine stained by the Champy-Maillet (ZIO) method as investigated by light microscopy and transmission electron microscopy. Scanning electron microscopic examination of the nerve elements in various layers of the intestinal wall has also been performed. The results indicate that the peripheral innervation consists of an autonomic ground plexus in which neuronal processes extend along a glial-cell framework. Projections from all the neurons form a network of separated, non-interconnected bundles, enclosed and supported by rows of independent glial cells. In the light microscopy of the ZIO stained specimen, amalgamation of glial cells and neuronal projections frequently occurs. The images thus caused appear identical to the structures described by Cajal as interstitial cells. Cajal attempted to apply his neuron theory to the enteric nervous system on the basis of his findings of these "interstitial cells" which he believed to represent primitive neurons. The "interstitial cells of Cajal", as designated by later researchers, were looked for by many histologists in the earlier half of the 20th century; however, they were not true cells but artifact images due to the staining of the autonomic ground plexus and/or nearby cellular elements. The "interstitial cells" defined by authors, including many electron microscopists from the 1960s to the 1980s were other type of cells, I.e., interstitial fibroblast-like cells.
Niigata University School of Medicine
1990-09
eng
departmental bulletin paper
http://hdl.handle.net/10191/33484
https://niigata-u.repo.nii.ac.jp/records/6622
AA00508361
05677734
Acta medica et biologica
Acta medica et biologica
38
3
103
127
https://niigata-u.repo.nii.ac.jp/record/6622/files/38(3)_103-127.pdf
application/pdf
17.1 MB
2019-08-06